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Volume 9, Number 3—March 2003

Research

Experimental Infection of North American Birds with the New York 1999 Strain of West Nile Virus

Nicholas Komar*Comments to Author , Stanley Langevin*, Steven Hinten*, Nicole Nemeth*†, Eric Edwards*†, Danielle L. Hettler*†, Brent S. Davis*, Richard A. Bowen†, and Michel L. Bunning*‡
Author affiliations: *Centers for Disease Control and Prevention, Fort Collins, Colorado, USA; †Colorado State University, Fort Collins, Colorado, USA; ‡Office of the Surgeon General, United States Air Force, Bolling Air Force Base, Washington, D.C., USA

Main Article

Table 8

Viral load, determined by Vero plaque assay, in organs harvested from fatal cases of West Nile virus infection in experimentally infected birdsa

Species ID no. Sex Mode of 
infection Organ (log10 PFU/0.5 cm3)
Br Ki He Sp Li Lu In Es Go Sk Ey
Ring-billed Gull
BDG
Male
M
2.7
2.8
1.0
3.3
3.0
3.2
<1.0
2.7
1.6
3.0
2.0
Ring-billed Gull
LG
Female
C
3.0
2.4
1.7
1.3
<1.0
<1.0
<1.0
2.3
3.0
2.4
3.0
American Crow
21
Male
C
7.2
7.6
5.4
7.9
7.5
8.5
7.6
7.8
6.8
4.4
7.7
American Crow
24
Female
M
6.0
8.2
7.7
7.0
7.3
7.1
8.4
7.4
7.0
4.6
6.6
American Crow
25
Female
M
5.9
7.2
5.7
6.7
6.8
6.7
10.6
6.2
7.9
3.8
6.9
American Crow
34
Female
C
8.3
8.2
7.8
7.9
7.7
8.3
9.0
8.2
8.1
5.3
7.9
American Crow
37
NR
C
7.2
8.2
7.7
7.8
7.4
8.5
10.0
7.3
NT
5.3
7.7
American Crow
41
Female
M
8.3
9.1
8.5
8.7
8.7
10.3
6.6
8.8
9.4
5.6
8.5
American Crow
42
Female
M
8.1
9.1
8.4
7.8
8.1
8.4
10.3
8.6
8.3
5.8
7.9
American Crow
529
Female
M
6.1
7.2
7.0
6.5
5.3
7.7
5.7
5.9
6.9
6.8
5.7
American Crow
543
Female
M
8.3
8.4
8.4
7.2
7.4
9.6
8.7
8.0
8.7
5.9
8.6
American Crow
562
NR
M
8.3
8.2
6.9
7.7
7.7
8.1
10.2
7.4
8.1
5.8
7.3
American Crow
574
Male
C
8.3
8.1
8.2
8.0
8.6
8.1
9.7
6.3
7.8
6.1
7.5
American Crow
805
Male
M
8.1
6.5
7.3
5.9
6.3
9.2
8.3
8.0
6.3
6.4
8.7
Fish Crow
005
Male
M
6.9
4.0
<2.0
3.3
3.5
4.0
4.5
8.5
4.4
3.0
6.2
Fish Crow
016
Male
M
2.7
3.2
6.6
1.0
1.0
4.6
5.2
5.1
3.6
4.0
4.8
Fish Crow
036
NR
M
3.0
3.1
6.6
3.3
1.5
5.3
3.0
6.5
3.3
4.9
3.1
Fish Crow
038
Male
M
4.1
3.9
4.7
1.3
1.0
4.4
2.0
5.4
4.5
2.8
5.0
Fish Crow
050
Female
M
6.9
8.1
8.5
8.2
7.8
7.6
8.6
7.7
8.0
5.5
6.9
Fish Crow
058
Male
M
4.5
5.1
6.9
2.4
1.6
5.8
6.0
5.1
2.7
5.0
5.3
Fish Crow
402
Male
U
4.7
3.6
3.8
3.7
1.5
3.0
2.8
7.4
1.8
3.7
5.8
Blue Jay
124
NR
M
7.4b
7.8
9.0
8.3
8.8
9.1
6.3
NT
7.1
NT
NT
Blue Jay
125
NR
M
7.3b
8.6
9.1
8.3
8.9
9.2
7.3
NT
7.3
NT
NT
Blue Jay
908
Male
C
8.2
9.0
8.8
8.6
8.5
9.0
8.0
8.7
9.1
6.9
7.9
Blue Jay
909
Male
C
2.7
6.1
6.6
5.5
4.3
5.8
3.4
4.5
5.0
5.9
7.1
Blue Jay
910
Female
M
8.2
9.0
9.0
8.1
8.4
9.1
7.9
8.9
9.1
6.0
8.0
Black-billed Magpie
LG
Male
M
4.7
6.6
6.6
3.9
5.4
6.5
4.8
6.7
5.9
5.5
6.3
Black-billed Magpie
RBLG
Male
M
5.9
5.5
5.0
4.0
4.8
4.4
2.7
5.9
4.8
4.1
4.6
Black-billed Magpie
NB
Male
C
5.8
6.2
7.2
5.9
6.4
5.7
5.1
5.9
6.5
4.8
5.5
Black-billed Magpie
RB
Male
C
5.0
7.7
6.2
4.5
6.8
6.3
5.2
5.8
4.7
5.9
5.3
Black-billed Magpie
RG
Female
M
6.4
5.4
6.7
4.7
1.9
6.1
1.0
6.6
4.5
5.9
4.7
Common Grackle
120
Male
M
3.5
>3.6
>3.6
>3.6
>3.6
>3.6
<1.0
5.0
<1.0
4.0
5.0
Common Grackle
123
Male
M
2.4
>3.3
NT
NT
NT
NT
<1.0
4.9
5.1
4.6
4.9
House Finch
0
Female
M
3.9
3.8
5.9
3.6
3.8
3.9
<1.0
5.5
3.8
4.1
6.2
House Finch 1 Male M 4.9 3.0 6.1 3.5 2.7 6.0 <1.0 5.7 3.2 5.8 6.3

aBR, brain; Ki, kidney; He, heart; Sp, spleen; Li, liver; Lu, lung; In, intestine; Es, esophagus; Go, gonad; Sk, skin; Ey, eye; M, mosquito-exposed; C, contact-exposed; U, undetermined mode of transmission; NR, not recorded; and NT, not tested.
bBlue Jay brains were evaluated for viral load in both cerebellum and cortex. In both cases, cerebellum was negative.

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